Preflop: Well, even if he does fold a lot I don't see really a reason to give him a look at the flop. Of course we could argue but trying to keep his range wide but we have a pretty easy 3bet for value here.

As playedPostflop: 3bet/Broke would be overplayed vs such a guy who also has super-high W$SD and as you said he hasn't done it yet before. Therefore means only considered option is to Call it and reevaluate the turn but then again his Check/Raise size is even quite high towards potting it. So whatever you pick I wouldn't say would be wrong (Call or Fold), I would most likely end up folding without any specific information and his line being too strong with the size.

But it's also the case here that such a guy very often drops down his hand on the turn without having a hand, so we can also easily Call the flop as well. Although I rarely doubt that we going to see Kx hands here.